Bending and straightening machine.



J. OLSGN.

BENDING AND STRAIGHTENING MACHINE.

APPLICATION FILED MAB. 15, 1909.

Patented Ju1y5,1941o.

' 2 BHBBTS-BHBET 1.

J. uLsoN. BENDING` AND STRAIGHTENING MACHINE.

APPLICATION FILED MAB.. 15. 1909.

Patented July l5, 1910.

2 SHEETS-SHEET 2.

UNITED sTATEs PATENT oEErcE.

JULIUS OLSON, OF CHICAGO, ILLINOIS; ASSIGNOR: TOl-I-LJSJEDL-ELCOOKVCOMPANY, OF CHICAGO, ILLINOIS, A CORPORASIIONv OF'ILLINOIS.-

BENDING AND STRAIGI-ITENING- MACHINE.

Specification of Letters Batent.

Application ledMarch 15, 1909iv Serial No; 483,491.

cago, Cook county, Illinois,- have inventedcertain new and usefulImprovementsin Straightening and Bending Machines, of which thefollowing is a specification.

My invention relates to straightening and are commonly bending machineswhich termedl in practice bulldozers, and the object thereof istoprovidea machine `of this character with simple and efficient means forregulating the blow and for following up the work with thetool as theoperation of straightening and bending proceeds.-

The various features of advantage and utility in my improved machinewill be app arent from thev description hereinafter given.

In the drawings, Figure 1 is a side eleva` tion of a machine embodyingmy invention; Fig. 2 a section onthe line 2 2 of Fig. 3; Fig. 3 a plan=view of the machine; Fig. 4 a section on the line 4 4 of Fig. 3'; andFig. 5 a section onthe line 5-5 of Fig. 3.

The operating parts of the machine are provided with a suitable frame orbed which may be of any desired character or construction but which ishere shown as a bed 1 of Ibeam and plate construction. end of the bed ismounted the driving mechanism which, so far as my invention isconcerned, may be of any suitable or desirable construction but whichhere comprises the following elements: The power-shaft 2 of the machine,which is driven by anyI suitable primev mover, is provided with a pinion3 meshing with a gear 4 secured to a crossshaft 5` and provided with apinion 6. This latter' pinion in turn meshes withl a gear 7 mounted onthe main shaft 8- suitably journaled on the bed of the machine. Thismain shaft is an eccentric shaft being provided with an eccentric 8awhich is formed' intermediate its length and coperatesl with aneccentric strap 9 extending forwardly and longitudinally of themachine.This eccentric strap is pivotally connected at its forward end toacross-head 10 movable Vin suitable guides indicated'at 11' on theupperface of" the machine bed. This cross-head is operatively connectedwith one ofthe members of" a block which are so constructed and re'-lated as to adjust or change the widthk of of the working tool Upon onesuch block as determined by the operator, inthe manner. hereinafterdescribed. In the present-` instance and. by preference this cross-headis connected toits block member 12` by being dove-tailed therein asindicated in Figs. 1* and 2 and this block member is in turn operativelyconnected to its companion member 13, being connected in suitablemannerbut preferably by dove-tailing, as shown inthe same figures. Thesetwo 4block members formV a rectangular-shaped block when the same are attheir-intermediate position and are provided with adjacent complementaryfaces, with the result thatby shifting the same longitudinally upon suchfaces or oblique line of division the width of the block is increased ordecreased, according to the relative direction of shifting of the blockmembers or sections. The forward block member 13 is operativelyconnected as by means of dove-tailing to the rearward end of a slidingor reciprocating tool holder or head 14 whose forward end receives andremovably holds the working tool 15 usually employed forl the purpose.

The machine is also provided with the usual.` work-holder or bracket 16,to which the work is clamped and by which it is held in the ordinary andwell-known mam ner.

As stated, my invention resides in the means for regulating the blow ofthe working` tool and suitable and eflicient means for following up thework with the tool, to which end the adjustable block already describedisemployed. For the convenient operation of' the block members orsections by sliding or shifting them one uponv the other in the properdirection, I employ suitable means under the control of the operator,the same here consisting ofa T`shaped lever 17 arranged in horizontalposition with the lever arm extending to one side of the machine withineasy reach of the operator, the cross arm of such lever beingoperatively connected by means of links 18 and 19t-o opposite ends ofthe two block sections, the link 18 being connected to one end of theblock section 12 and the link 19 being connected to the other blocksection but at the opposite end thereof. For the purpose of pivoting;and supporting this operating lever I employ a bracket 20 which issecure upony the cross-head 10 and thereby reciproca-tes with it.

Patented J uly 5, 1910.

i are Yin the relative position shown in Fig. 3 the working tool has amiddle range of travel but that when thehand lever 17 is Y moved in aclockwise direction the limitsrof travel of the working tool areadvanced, and the work may be followed up, inasmuch as this movement vofthe hand lever so shifts the block sections that the width ofthe Vsolblock will be increased. A movement of the hand lever in therop ositedirection will have the contrary resu t.

By preference the work bracket 16 is movable toward and away from thereciprocating head 15 and to this end such bracket 1s arranged to slideyon the main frame or bed 1 of the machine and to be clamped in adjustedyposition by means of the clampinor .bolts 21 and the plate 22. Also byprefjerence the bending blocks carried by such bracket are adjustabletransversely of the machine and consequently transversely of thedirection of reciprocation of the head 15, to which end the blocks 23into which the bending tools proper `marked 24: are inserted bydovetailing or otherwise, are inthe present instance dovetailed onto thebracket yand secured or Vholder and its working tool, vof operatingclamped in place by the bolts 2 5 whose heads p 25a`slide inthe'transverse groove 26 in the bracket, (seeFigs. 1 and 4:).

1.' In a machine of the class described, the combination with the workbracket or suportA and the reciprocating tool head `or Y mechanism foroperating the head Yincluding an interposed block made insimilarsections I movable with respect to each other and in oppositedirections to vary the size thereof inthe direction o f reciprocation.v

2'. In a'machine of the class described, the combination with the workbracket or support and the reciprocating tool head or holder .and itskworking tool, ofoperating mechanism kfor operatingthe head including aninterposed block made in similar sections Y slidable upon each other inopposite direcveo tions to vary the Vsize thereof in the direction of.reciprocation.

3. -In amachine ofthe class described, the combination with the workbracket or support and the reciprocating tool head or holder and itsworking tool, of operating mechanism for operating the headf includingan interposed block made in similar sections with complementary inclinedmeeting faces slidable upon each other to vary the size ofv 'the blockin the direction of reciprocation.

4. In a machine of the class described, the combination with the workbracket or support. and the reciprocating tool head or holder and itsWorking tool, of operating mechanism foroperating the head including Yan interposed block made in similar sections with complementary inclined`meeting faces,V

an'dmeans for'moving such sections in oppositedirections andtransversely of the direction of reciprocation to vary the size thereoflongitudinally of such direction of reciprocation.

5. In a machine of the class described, the combination with the workbracket or support and the reciprocating tool head or holder and itsworking tool, `of operating mechanism for operating the head includingan interposed block made in similar sections with complementary inclinedmeeting faces, and means for moving such sections in unison in oppositedirections and transversely of the direction of reciprocation.

6. In a machine of the class described, the combination with the workbracket or support and the reciprocating `tool head or holder and itsworking tool, of operating mechanism for operating the head including aninterposed block made in similar sections with complementary inclinedmeeting faces, and an operating lever operatively connected with saidsections for moving them in unison and in opposite directions andtransversely of the direction of reciprocation.

7. In a machine of the class described, the combination with the workbracket or support and the reciprocating tool head or holder and itsworking tool, of operating mechanism for operating the head including aninterposed block made in similar sections with complementary inclinedmeeting faces, and a T-shaped lever operatively connected at the ends ofits cross arm with opposite ends of said sections.

8. In a machine of the class described, the combination with the workbracket 0r support and the reciprocating tool head or holder and itsworking tool, of operating vmechanism. for Voperating the head includingan interposed block made in similar sections with kcomplementaryinclined `meeting' faces, a pivoted T-shaped lever, and links connectingbetween the ends ofthe cross arm of such lever and opposite ends of saidsections.

9. In av machine of the class described, the combination with the workbracket or support and the reciprocating tool head or holder and itsworking tool, vof operating mechanism for operatin the head including aninterposed block ma e in similar sections with complementary meetingfaces which are dovetailed together, and means for moving` said sectionsin unison and transversely of the -direction of recprocation.

l0. In a machine of the class described7 the combination With the Workbracket or support and the reciprocating tool head or holder and itsWorking tool, of operating mechanism for operating the head including aninterposed block made in similar sections Wth complementary meetingfaces,

and also including an eccentric shaft, an 10 eccentric strap coperating`therewith, and a cross head connected at one end with the strap and atthe other end With one of the block sections.

JULIUS OLSON. Witnesses:

THos. P. ODoNovAN, R. GoLDsTINE.

